non-observance
noun/ˌnɒn əbˈzɜːvəns/
/ˌnɑːn əbˈzɜːrvəns/
[uncountable] (formal)- the failure to keep or to obey a rule, custom, etc.
违反，不遵从（规章、习俗等） - They were accused of non-observance of the terms of the contract.
他们被指控不遵守合同条款。
- They were accused of non-observance of the terms of the contract.